idle current wattmeter

例句：

1. 1.The idle current wattmeter was used to monitor the power consumption of the building.
   闲置电流表被用来监测建筑物的电力消耗。
2. 2. The idle current wattmeter showed that the building was not in use during the day.
   闲置电流表显示，大楼白天并未使用。
3. 3. The idle current wattmeter was a useful tool for monitoring energy usage in a building.
   闲置电流表是监控建筑能源使用的一个有用的工具。